BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
IAD→JST

Washington, DC (IAD) to Johnstown, PA (JST) flight delay odds

72.2% of 338 official scheduled IAD-to-JST flights arrived on time; 16.9% arrived at least 30 minutes late and 3.6% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
72.2%arrived on time
16.9%30+ min late
3.6%cancelled
338scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late13.9%all scheduled flights
120+ minutes late9.2%all scheduled flights
Diverted1.2%did not reach as scheduled
Average arrival+33.3 mincompleted flights

Which departure time was most reliable for IAD to JST?

Only Afternoon met the IAD-to-JST departure window threshold: 72.2% of 338 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Afternoon33872.2%16.9%3.6%

Which weekday was most reliable for IAD to JST?

Among qualifying IAD-to-JST weekday results, Saturday had the highest on-time rate: 79.5% of 39 flights. Wednesday was lowest at 67.3% across 52 flights.

DayFlightsOn time30+ minCancelled
Monday5273.1%15.4%5.8%
Tuesday4070.0%22.5%2.5%
Wednesday5267.3%19.2%1.9%
Thursday5168.6%21.6%3.9%
Friday5276.9%13.5%1.9%
Saturday3979.5%7.7%2.6%
Sunday5271.2%17.3%5.8%

Which airline was most reliable for IAD to JST?

Only SkyWest Airlines met the IAD-to-JST airline threshold: 72.2% of 338 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines33872.2%16.9%3.6%

Which month was most reliable for IAD to JST?

Among qualifying IAD-to-JST month results, October 2025 had the highest on-time rate: 90.3% of 31 flights. December 2025 was lowest at 45.2% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253171.0%16.1%0.0%
August 20253180.6%12.9%0.0%
September 20253086.7%6.7%0.0%
October 20253190.3%3.2%0.0%
November 20253066.7%26.7%0.0%
December 20253145.2%29.0%12.9%
January 20263070.0%13.3%6.7%
February 20262867.9%28.6%0.0%
March 20263158.1%22.6%16.1%
April 20262281.8%13.6%4.5%
May 20262272.7%18.2%0.0%
June 20262181.0%9.5%0.0%

What drove IAD to JST delay minutes?

Late aircraft was the largest recorded IAD-to-JST delay category, accounting for 40.3% of 12,967 BTS-attributed delay minutes during July 2025–June 2026.

Airline29.4%
Late aircraft40.3%
National airspace2.9%
Weather27.4%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.